AO-5: Approved Programmes

Announced on 28 June 2024

The 5th Announcement of Opportunity (AO-5) for the CHEOPS Guest Observers (GO) Programme opened on 12 March 2024 and closed on 25 April 2024. It is the second call of the first extended mission and covers observing time in the period from 1 October 2024 until 30 September 2025. The available GO share of the science observing time was recently increased from 20% (in the Nominal Mission) to 30% (in the first Extended Mission).

A total of 36 proposals were received in reply to AO-5, requesting 2415 orbits (with each orbit circa 99 minutes in duration). The requests represented 160% of the available science observing time foreseen in the AO-5 observing cycle (circa 1505.5 orbits).

The CHEOPS Time Allocation Committee (TAC) met on 5 - 7 June 2024. Based on the TAC's recommendations, the Director of Science has awarded CHEOPS observing time to the proposals listed in the table below. In the end, 20 proposals were awarded observing time totaling 1640 orbits. Of these, 18 proposals were on exoplanet science and 2 on stellar science. The TAC-recommended allocation of observing time represents up to 109% of the available GO science observing time foreseen in the AO-5 observing cycle.

Succesful proposals will be implemented as GO programmes. Targets that are part of these GO programmes can generally not be included in other observing programmes unless in specific cases. All programmes have been assigned a priority from Priority 1, or P1 (high), to Priority 3, or P3, (low). This priority is taken into account by the automated planning tool used in the weekly/biweekly planning, and is a strong indicator of the likelihood that observations will be scheduled. Observers are reminded that the award of observing time provides no guarantee that the observations can be executed, and that generally more observing timeis awarded than can be physically scheduled to minimise idle time.

Principal Investigators (PIs) of proposals that have been awarded time have been contacted by email, and are required to complete and submit observation requests at their earliest convenience. Guidelines on how to prepare observation requests can be found here. The TAC feedback has been provided to all PIs of proposals.

A fraction of up to 15% of the GO Programme time will remain available to the community to apply for time via the Discretionary Programme (DP), which is foreseen to continue running throughout the mission lifetime. This is in line with a possible over-allocation of up to 124% to facilitate the efficient scheduling of time critical observations.

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ID

PI name (country)

Proposal title

Nr. of orbits (priority)

2

Olga Balsalobre-Ruza (ES)

Seeking Earths in the shadows: visiting the Lagrangian points of two co-orbital candidates

40.0 (P2)

4

Julien Poyatos (ES)

Measuring the nanoflaring activity of bright M dwarfs

300.0 (P3)

6

Jorge Lillo-Box (ES)

A second transit for a radial velocity detected temperate sub-Neptune in a multi-planetary system

19.6 (P1)

7

Fan Yang (CN)

Abnormally Rapid Transit Timing Variations of WASP-161b: Evidence for Tidal Evolution or the Existence of an Earth-Sized Planet?

21.0 (P2)

8

Matthew Standing (ES)

Validation of candidate TESS Neptune Desert Planets

197.0* (P2)

12

Carlos del Burgo (ES)

What is the orbital period of the most massive very young transiting exoplanet, HD 114082 b?

86.1 (P1)

13

Victoria DiTomasso (US)

Detecting the Second Transit of a Temperate sub-Neptune to Enable Atmospheric Studies

52.0 (P1)

15

Alejandro Suárez Mascareño (ES)

Characterization of the system K2-155 with CHEOPS

64.5 (P2)

16

Daniel J. Stevens (US)

A High-Precision Primary Eclipse of a “Benchmark” Hierarchical Triple Star System

32.0 (P1)

17

Rachael Roettenbacher (US)

A CHEOPS Light Curve of ε Eridani with Contemporaneous Long-Baseline Optical Interferometry and Extreme Precision Radial Velocity Observations

200.0 (P2)

18

Anne Dattilo (US)

Transit Timing Variation Monitoring of 2 planets around a very young star

118.0 (P1)

20

Sydney Vach (AU)

Confirmation of two transiting planets around pre-main sequence stars with CHEOPS

42.0 (P2)

22

Nicholas Scarsdale (US)

Characterizing The Brightest-Host Transiting Habitable Zone Terrestrial Exoplanet

28.0 (P1)

24

Gaia Lacedelli (ES)

CHEOPS' scrutiny of long-period planets: characterization of a warm Jupiter orbiting a Sun-like star

38.0 (P2)

26

Hritam Chakraborty (CH)

Measuring precise masses and radii of two key young exoplanets in the same system

205.9 (P1)

27

Isabel Rebollido (ES)

A highly disruptive event in ASASSN-21qj: exocomets or planetary collision?

60.0 (P2)

31

Prune Camille August (DK)

Measuring Albedos for Different Hot Jupiters

70.0 (P1)

32

Alison Duck (US)

Characterizing Albedos and Eccentricities of 3 Ultra Hot Jupiters with Multi-bandpass Observations

14.0** (P2)

33

Pietro Leonardi (IT)

Transit timing variations of V1298 Tau b: a step forward to decipher the elusive architecture of the infant multi-planet system V1298 Tau

60.0 (P1)

35

Hinna Shivkumar (NL)

Fresh out of the oven: A comprehensive survey of transiting young sub-Neptune planets

78.0 (P2)

* Only the four targets in RV follow-up programmes, one of them shared with another programme.

** Only the target not in common with a higher rank proposal.

 

Questions about CHEOPS or the GO Programme? Please email cheops-support at cosmos.esa.int and we will be happy to help!
Last updated 14 July 2023